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Home >> Saturn >> 2007 >> Relay 3.9 W >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P0010 To DTC P0420 >> DTC P0340 or P0341 >> Circuit/System Verification
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Circuit/System Verification

  1. With the ignition OFF, inspect the engine wiring harnesses carrying the CMP sensor circuits for the following conditions:
    • Close routing of secondary ignition wires
    • Close routing of aftermarket electrical equipment
    • Close to solenoids, motors, and relays
    • Correct any wire harness routing or component placement conditions, if it is determined to be a possible source of electrical interference.
  2. With the engine running, observe the CMP Sensor parameter using the scan tool. Operate the engine from idle up to 3,000 RPM. The CMP Sensor speed should match the Engine Speed parameter within 100 RPM.
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